Chuck-actuating mechanism.



PATENTED JULY 17', 1906.

B. M. W. HANSON. CHUCK AUTUAHNG MECHANISM.

APPLICATIOF FILED SEPT 19,1904.

yl zifizefs'sesx UNITED srn res I A ENT OFFICE."

BENGT M. W, HANSON, OF HARTLFOR'I), CONNECTICUT, ASSIGNOR TO PRATT &: WI-HTNEY COMPANY, CORPORATION OF NEW JERSEY.

Ol HARTFGRD, CONNECTICUT, A.

CHUCK-ACTUATiNG MEGHANlSM.

Specification of Letters Patent.

Patented July 17, 1906,

Application filed September 19, 190%. Serial Ho. 225,031.

To all whom it may concern:

Be it known that I, Boner M. W. HANSON, a citizen of Sweden, residing at Hart-lord, in the county of Hartford and State of Con necticut, have invented certain new and. useful Improvements in Chuck-Actuating Moehan ism, of which the following iss specification.

This invention relates to chuck-operating mechanism, and has for its object the previ- Sion of compact devices for causing the chuck to hold the stock.

A further object of the invention is the provision of pneumatic devices for operating the chuck, as will be hereinafter explained.

A further objectv of'the inventionis the provision of means whereby the grasping peace: 7 of the chuck me be regulated.

My improve mechanism is actuated by fluidsuoh, for instance, as compressed sir and comprises in the preferred form shown a c linder and multiple pistons in said cylinder, t ereby affording a large surface for the fluid to act upon, as hereinafter set forth. In this thro which the end ofQthe cylinder abuts, said c l-' way the usual single cylinder of large dismeter is dispensed with, end as the spindle upon which said cylinder is mounted is subject to reversal while runningat high speed the momentum thereof causes objectionable strains upon the drivinamechemsm, which strains are obviated by t e present construction.

in the accompanying drawinEs Figure 1 is a, longitudinal vertical section 0 thehead of a. lathe provided with m improved chuck-aetueting mechanism. ig. 2 is a. sectional view, on a larger scale than Fig. 1, illustrating the air connection.

Like characters designate similar parts hout both the views.

R erring to the drawings, the numeral 5 designates the licad'of'a, lathe which is provided with the usual bearings 6 6 to mcciye a hollow spindle'l, drivenb "pulley 8, on the hubsofwhich are momite loose pulleys 9 9. Apllinder 10 is fitted to the end of rotary spindle '2, the latter bein sli htly reduced at its rear end to form a 3 cu der 11, a'eiest i inder being held in place by a. screw 12. ted within the c linder 10 are three pistons; 13 13' 13', as own in 1, althoughs greater or lees number may bee'mployesk without depanturefrom the invention, and

hive fluid supplied from a shaft 14, tubular for a. portion of its length, as at 14, thetubule-r portion being provided with orts 16 16 36, through Wl'llCll air is admitte to the cylinder 10 to operate the pistons end acts between piston 13 and the inner end cl the'cylinder l0 piston 13, and the partition 1'? and p ton 13 and the partition 18. L For eonveniencein assembling the parts the cylinder is bored out at difierent internal diameters for the successive pistons.

Partitions 1? 18 are fitted in place against shoulders on the inner wall of the cylinder, so that they may receive the thrust of the motive fluid without being displaced, and they are secured against rotation with relation to the c linder by screws 17 18.

All the pistons. are keyed to shaft 14 and are secured against longitudinal movement on said shaft by the shoulder 19 and nut 20. Each piston consists of a. web portion a and an extended hub b, the hubs essing through the partitions and end of t e e hnder, as shown in Fig. 1, and the hub o piston'lfi abutting against the shoulder 19 aforesaid.

Designated by 21 is a tubular drew-in spindle'p'r'ofided with a. head 21' at its end, said head how/"lugs; T slot to receive a similsrl shaped porhon'o'n'thc end of shaft 14,88 in cated by 22, whereby no binding action due to the possible improper al'mement. of the perks, will afieot the action of the pistons. A spring 23, always under tension, acts a cinch t e T-heed of t 1e shaft 14 and against 2 e innot well of the cylinder 10 to force the tubu;

isr s indie 21 forward, and thereby release the c uck 21 (shown as of the eollet variety) carried by said spindle.

A stationary collar 25 is mounted on the reduced end 24 of the tubular shaft 14, and said eolleihas an internal groove 2 6, to which fluid isconducted by the pipe 15. The fluid then passes through a port 27 to the inner side 7 cg the shaft 14. ounted on each side of the titelyishd a s lit clamp-nut 3C! is, rovi ed, 'so tl atwecr o the arts ma. be ta on up.

usin ho ow stec the gr power of the clmok clue to the eetionlol l fi .thepistons tend to crush the same,aud therefore provision is made whereby one or more of the pistons me be out out of 143M011;

said pistonsare actuated by air' or other mo To accomplish this t, on adjustable valveilsr i are hardened washers 28 2Q, res ecloo 31 is secured to a rod 32, having ling-idol zed l l'll'fitlllttl portion 3-3 screwed into the end oi the tubular slmlt i l, and tlierel'm'e onstituting a plug for the some. The valve Iii is ailjustable along the rod 32 and may be siur -d at any point of adjustmentby a screw 3*], entering any one of a seri s of openings 115 in said rod, In will be readily evident, this Valve may be adjusted Mon; ill! rod to blow. any of the ports desired, and thm'ri'ore throw certain ol the pistons out of aeiion.

Should the stock vary in diameterthrough out its length or be slightly dill'el' iit in :IIL',

way from standard stock, th chuck in use is adapted to receive or should it have an on even surface (like, for instance, rough castiron) the series of pisl ons is of great value in V causing the chuck-jaws in close upon said stock under multiplied pressure, and thin;

. nor end of the rod firmly to grasp the sauna By retracting the screw 33 and its at tached rod 32 the valve 31 may be withdrawn through the bore of the tubular shaft 14. to be reset when it is desired to operate one or more of the pistons. in Fig. 1 the valve is shown in position to cut oil the rear piston 16, but when it is desirable to operate all th pistons the valve will be adjuwivd to the iii-- 31!, the bore oi the ell-alt 1 'l extending inward for enough t enable th valve to be seated beyond the port if}. (bier- Fig. l.)

To prevent the cushioning etl'e 't tween the inner pinion of the series: and the cylinder 10, a port 35 is provided, r. hirb wits as an airwc-rd, A pin 36 is fast ned in thriston l3 and enters an. opening so in the liead of the cylinder in. and thus nets in clutch to transmit the motion of the linder 10, which is secured to the spindle Tr to 'lie piston 13, shalt l4, and the remaining pistons of the series. This. clutch-pin limited a distance from the xis of the cylinder it), so that when the spindle is reversed substantially no shock occurs in rotating the pistons While my invention is shown applied to a. common form of lathe-head, it, is distinctly to be understood that it is not limited there to, for it is applicable as a means for actnat ingchucks of any suitable kind and may be applied to any desired machine.

Changes may be made in the form and pro-- portion of the parts, and they 'may be disposed either ho ri zontally, vertically, or otherwise without dc iartnre from the invention.

Having thus described my invention, what I claim is- 1. The combination, with a chuck, and its sup ort, of a series of pistons for actuatim oi a tubular (buck-spindle;

L. The combination, with a chuck and its spindle, ol :1 cylinder carried by said spindle, and llll ring a plurality of com mrtinents; pistons in ilw emnpart menls; means connecting llic pisiuns and chuck; and means for controlling the supply of motive fluid to one or i more ol" the coinpartinenis ol' said cylinder.

3'. The combination, with a spindle, of a hunk: a. i-hlurk-spindle; a cylinder having a plurality olcolnpiirtnienis carried by the (pin-die: pistons in the co:npartimrnts ol the cylinder; a bor d slwlt connecting the cone parimrnis with the (buck-spindle; and a valve in the bore of said shaft for admitting motive lluid to oneorel] of the compartments of said cylinder.

4-. The combination, with a main spindle, ola tubular chuclcspindle; a hollow shaft connected with said chuck-spindle; a com- 1iartineniwylinder surrounding the hollow shaft; and connected to the main spindle; a series oi pistons rigid with the hollow shaft, and mounted in the compartments of the cylinder; means for so plying motive fluid to the hollow shaft: andhneans whereby motive lluid from the hollow shaft may be supplied. to one or more of said compartments.

5. The combination, with a main spindle,

a compartmentuylinder carried by t :e lnain spindle: a shaft having; a head connected with said chuckspindle, and also having; ports; pistons keyed to the hollow shaft. and mounted in the comparuoents oi the cylinder; and an adjustable valve for opening" and closing said ports.

6. The combination, with a main spindle, a compartinent-cylinder rigid therewith; a cliurla-s rlindle; a chuck carried by said spindle; a bored shaft connected to the ebnck-spimlle, said shaft-having ports comnnn'licating with the cylinder; and pistons within the cylinder, and carried by the shaft.

T. The combination, with a chuck and its sup iort, of a chuck-spindle; a partitnbular shat connected to the chuck-spindle, said shaft having ports; a cylinder; a main spin die to which the cylinder is secured; a series of pistons secured to the tubular shaft; pan titions seated in the cylinder between the pistons; a valve inthe tubular shaft; and means for adjusting said valve.

S. The cmnbinat-ion, with a chuck and its supwrt. of a chuck-spindle; a partitubular shalt connected to the chuck-spindle, said shal' t having ports; a cylinder; a main spindle to which the cylinder is secured; a series of pistons secured to the tubular shaft; partitions seated in the cylinder between the pistons; a rod mounted in the tubular shaft; and a valve adjustable alcn ,said rod.

9. The coml'iination, wit 1 a tubular liveindle, of a chuck carried bysaid spindle; a s eeve connected to the chuck; it artit-ubu lor shaft having crts, said shaft eing connected with the c mck-sleeve; a; series of pis tons carried by said artitubular shaft; 9. die; and having a T-shsped siot, a shaft havcyiinder surrounding t ie shaft, and secured ing a. tenon fitted in said siot; a cyimder; a

to the live-spindle; partitions secured within the cylinder, and separating the pistons; a rod located in the tubular shaft, said rod hseing a. threaded head acting as a plug for "the bore of said shaft; a valve sdjnstsisie aiong said rod a stationary eoliar having a groove communicating with one of the ports of the shaft; and a. conduit leading from a storagereservoir to said collar.

having a siotted head, of a shaft having its and shaped to tit the slot in said head; :1 cyl inder surrounding the shaft: :1 piston in said cg'linder; means on the shaft for receiving t. 1e thrust of thepiston; and means for supplying motive fluid to the cylinder.

11. The combination, with a chne =sgintile, of a shaft extending from said vhuekspindle; a cylinder surrounding the shaft, and 7 advancing the shaft and iii mnnc-eted chuek- V spindle.

12. The comhinntion. with s idinek-spindie, andc'huck. of a head rigid with said spinspring on the shaft located betweenthe c l inder and tenon; a piston in the cylinder or setustin the shaft; and means for supplying Inntii'e iiiiid to the cylinder;

13. The combination, with a rota. child}- spindle, of a. bored shaft connect to said spindle, and hi ving a port; a rotary p lifider surrounding the shaft a piston in so! cylini r and connected to the shaft; a stationary sllar surrounding the shaft, and having a passage Communicating with the port of said shaft; and means for so plying motive fluid to the massage in said col a1.

14. he combination, with a tubular spindie, of a cylinder havin a series of pO partments rigid therewit h; 8 chicks n e mounted in the tubular spindle; a sh (unnected to the end of the chuck-spindle; a s viral s )ring Sillt'ifllfldilig said shaft between the end thereof and the end of the cylinder; p qons in the eonipartments of the c linder; and means for supplying motive fiui to said cylinder.

In testimony in presume of two witnesses.

BEXGT M. W. HANSON. 'it messes:

H E. BAiLER Y ii, i. BENEDICT.

whereof I stfix my signature 

